平方毫米(符號為mm²)是面積公制單位(SI Unit),其定義是「邊長為1毫米的正方形的面積」。

單位轉換

1平方毫米(1mm²)等於:


(1m²=1000000mm²)
(1cm²=100mm²)
(1µm²=0.000001mm²)

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